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Cheap flights from Ontario to London Heathrow Airport from £194

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LHR
9 Jul — 16 Jul1
1 adult

Cheap flight deals from Ontario to Heathrow

Keep the following information in mind while searching for Ontario to Heathrow flight deals. Data was last updated 4 July 2025.

Round-trip from

£392

One-way from

£194

Popular in

December

Cheapest in

February

Average price

£560

Good round-trip deal

£478 or less

Good one-way deal

£295 or less
Icelandair
  • Icelandair
  • 4/9-16/9
  • 2 total stops
  • 61h 25m total
  • Ontario to London
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28/8
  • 28/8
  • 1 total stop
  • 16h 40m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£12 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from Ontario to London Heathrow.
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Price to beat on a one-way flight from Ontario to London Heathrow.
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Find flight deals from Ontario to Heathrow

Cheapest flights from Ontario to Heathrow
Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.

Wed 19/1119:45YYZ - LHR
1 stop18h 45mIcelandair
Mon 8/1212:15LHR - YYZ
1 stop11h 00mIcelandair
Deal found 1/7£392
Tue 26/816:30YYZ - LHR
1 stop9h 00mAir Canada
Sun 21/908:30LHR - YYZ
Nonstop7h 55mAir Canada
Deal found 3/7£393
Sun 14/910:20YTZ - LHR
2 stops15h 10mAir Canada
Sun 28/906:50LHR - YTZ
2 stops14h 55mAir Canada
Deal found 3/7£393
Mon 20/1014:00YYZ - LHR
1 stop26h 00mLufthansa
Mon 27/1007:40LHR - YYZ
1 stop12h 15mLufthansa
Deal found 3/7£393
Wed 1/1021:55YUL - LHR
Nonstop6h 40mAir Canada
Wed 22/1009:30LHR - YUL
Nonstop7h 10mAir Canada
Deal found 3/7£394
Tue 26/817:40YYZ - LHR
1 stop11h 40mTAP AIR PORTUGAL
Mon 22/911:20LHR - YYZ
1 stop14h 40mTAP AIR PORTUGAL
Deal found 3/7£395
Wed 3/922:45YUL - LHR
1 stop11h 50mTAP AIR PORTUGAL
Wed 10/908:00LHR - YUL
1 stop17h 45mTAP AIR PORTUGAL
Deal found 2/7£396
Wed 15/1022:30YYZ - LHR
Nonstop7h 10mVirgin Atlantic
Wed 22/1006:30LHR - YYZ
1 stop12h 00mVirgin Atlantic
Deal found 1/7£399
Wed 3/921:55YUL - LHR
Nonstop6h 40mMultiple Airlines
Wed 10/906:50LHR - YUL
1 stop9h 45mMultiple Airlines
Deal found 3/7£399
Wed 1/1022:30YYZ - LHR
Nonstop7h 10mDelta
Fri 24/1006:30LHR - YYZ
1 stop11h 50mDelta
Deal found 1/7£400
Fri 15/819:15YYZ - LHR
1 stop9h 45mMultiple Airlines
Mon 1/917:50LHR - YYZ
1 stop22h 50mMultiple Airlines
Deal found 3/7£407
Tue 30/921:55YUL - LHR
Nonstop6h 40mLufthansa
Mon 6/1009:30LHR - YUL
Nonstop7h 10mLufthansa
Deal found 2/7£407

Cheapflights Fare Finder

Customise your flight search to find flights from Ontario to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 4 July 2025.
Use the filters below to find and compare flights from Ontario to London Heathrow Airport that are best for you.

Fly from

Ontario

Fly to

Heathrow

Route

Depart

Return

Price

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 4/9

23:00-11:55

1 stop31h 55m

London Heathrow

Tue 16/9

21:25-21:55

1 stop29h 30m

£392

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 19/10

06:30-21:00

1 stop9h 30m

London Heathrow

Mon 27/10

20:05-16:50

1 stop24h 45m

£393

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 20/10

14:00-21:00

1 stop26h 00m

London Heathrow

Wed 29/10

07:40-15:55

1 stop12h 15m

£393

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 1/10

21:55-09:35

Nonstop6h 40m

London Heathrow

Wed 22/10

09:30-11:40

Nonstop7h 10m

£394

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 24/8

17:35-17:45

1 stop19h 10m

London Heathrow

Wed 17/9

06:00-13:55

1 stop12h 55m

£396

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Sun 17/8

15:25-10:00

1 stop13h 35m

London Heathrow

Tue 26/8

09:30-14:46

1 stop10h 16m

£396

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 3/9

22:45-15:35

1 stop11h 50m

London Heathrow

Wed 10/9

08:00-20:45

1 stop17h 45m

£396

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 19/8

23:45-11:50

Nonstop7h 05m

London Heathrow

Thu 28/8

06:50-11:35

1 stop9h 45m

£397

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 1/10

22:30-10:40

Nonstop7h 10m

London Heathrow

Wed 22/10

08:40-19:55

1 stop16h 15m

£400

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 10/9

21:55-09:35

Nonstop6h 40m

London Heathrow

Mon 22/9

06:50-11:35

1 stop9h 45m

£402

Flights are sorted by cheapest return flights first.

Deals found on 3/7

Showing 1-10 of 60 results
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6

Best time to book a flight from Ontario to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ontario with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to London Heathrow Airport

What is the cheapest month to book a flight from Region of Ontario to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £112). Flying from Region of Ontario to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to LHR?

Find hourly flight availability from Ontario to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 July 2025.

When flying from Region of Ontario to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Region of Ontario to London Heathrow Airport

Explore weekly flight availability from Ontario to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 4 July 2025.

The most flights from CAON to LHR are scheduled on a Tuesday (46 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (34 on average).

How much does it cost for a return flight from Region of Ontario to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 4 July 2025.
See what other customers who have flown with Delta, Austrian Airlines, andFinnair from Ontario to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,982 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
809 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,304 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,654 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Region of Ontario to London Heathrow Airport one-way?

    £195 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Air Canada and Lufthansa, with prices starting from £204 and £222, respectively.

  • What are the most popular routes from Region of Ontario to London Heathrow Airport?

    When deciding which route to take from Region of Ontario to London Heathrow Airport consider Toronto Pearson Intl - London Heathrow, Montreal Pierre Elliott Trudeau Intl - London Heathrow or Toronto Island - London Heathrow as they are the most popular.

  • What are the most reliable airlines from Region of Ontario to London Heathrow Airport?

    No one likes to see their flight delayed. When booking a flight from Region of Ontario to London Heathrow Airport consider choosing Croatia Airlines (88%), Ethiopian Air (82%) or Singapore Airlines (81%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Region of Ontario to London Heathrow Airport?

    Looking for the cheapest flight from Region of Ontario to London Heathrow Airport? While on average our users pay £1,321, our data indicates the cheapest price to be £216. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £359.

  • Can I find deals for flights from Ontario to Heathrow that include hotel bookings?

    Yes. In addition to deals on Ontario to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Heathrow.

  • Can I find deals for business class flights from Ontario to Heathrow?

    Yes. Cheapflights offers flight deals from Ontario to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Region of Ontario to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £112). Flying from Region of Ontario to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Hounslow
Croydon
Milton Keynes
Deal
Northampton
Gatwick
Luton
Slough
Wembley
Crawley
Eastbourne
Ilford
Hayes
Folkestone
Southend-on-Sea
Watford
Ipswich
Winchester
Swindon
Maidstone

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Ontario to Heathrow

Discover the top 10 airlines that operate flights from Ontario to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 4 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£359Average£433FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£360Average£468FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapest£367Average£741FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AtlanticCheapest£389Average£458FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£394Average£570FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£397Average£517FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£398Average£508FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest£408Average£411FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£410Average£410FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Air FranceCheapest£504Average£505FlexibilityNo cancel feeOn-time77%
Search Air France flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to Heathrow?

Cheapflights makes it easy to find Ontario to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Heathrow?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to Heathrow for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ontario to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ontario to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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